VT

Initialism of ventricular tachycardia.

Initialism of videotape.

(dated) Initialism of video terminal. (device that connected to a computer server remotely, which had little computing power of its own. Has been uncommon since the mid 1990s)

Initialism of vacuum tube. (device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied)